78 citations · 352 across the 20 of their papers we have counts for
20 papers
Quantum reference frames beyond subsystems: a reconstruction and generalization of the perspective-neutral framework
Stefan L. Ludescher, Manuel Mekonnen, Thomas D. Galley +1
We generalize the notion of quantum reference frames (QRFs) to cases where the frame does not necessarily correspond to a tensor factor subsystem, but to a covariant quantum instru…
Complete Relational Description of Spin in a Quantum Background
Hannah Troger, Ofek Bengyat, Thomas D. Galley +1
The standard description of the state of a spin in quantum mechanics presupposes externally fixed directions -- a classical background. Can a spin be fully described instead in rel…
Interpreting quantum reference frame transformations through a simple example
Esteban Castro-Ruiz, Thomas D. Galley, Leon Loveridge
Quantum reference frame transformations have been proposed to provide a means by which to translate descriptions of quantum systems relative to each other. At present, there are se…
Gravity-mediated entanglement via infinite-dimensional systems
Stefan L. Ludescher, Leon D. Loveridge, Thomas D. Galley +1
There has been a wave of recent interest in detecting the quantum nature of gravity with table-top experiments that witness gravitationally mediated entanglement. Central to these…
Invariance under quantum permutations rules out parastatistics
Manuel Mekonnen, Thomas D. Galley, Markus P. Mueller
Quantum systems invariant under particle exchange are either Bosons or Fermions, even though quantum theory in principle admits more general behavior under permutations. But why do…
Theory-independent monitoring of the decoherence of a superconducting qubit with generalized contextuality
Albert Aloy, Matteo Fadel, Thomas D. Galley +2
Characterizing the nonclassicality of quantum systems under minimal assumptions is an important challenge for quantum foundations and technology. Here we introduce a theory-indepen…
Resource-theoretic hierarchy of contextuality for general probabilistic theories
Lorenzo Catani, Thomas D. Galley, Tomáš Gonda
In this work we present a hierarchy of generalized contextuality. It refines the traditional binary distinction between contextual and noncontextual theories, and facilitates their…
Spin-bounded correlations: rotation boxes within and beyond quantum theory
Albert Aloy, Thomas D. Galley, Caroline L. Jones +2
How can detector click probabilities respond to spatial rotations around a fixed axis, in any possible physical theory? Here, we give a thorough mathematical analysis of this quest…
Response to "The measurement postulates of quantum mechanics are not redundant"
Lluís Masanes, Thomas D. Galley, Markus P. Müller
Adrian Kent has recently presented a critique [arXiv:2307.06191] of our paper [Nat. Comms. 10, 1361 (2019)] in which he claims to refute our main result: the measurement postulates…
Any consistent coupling between classical gravity and quantum matter is fundamentally irreversible
Thomas D. Galley, Flaminia Giacomini, John H. Selby
When gravity is sourced by a quantum system, there is tension between its role as the mediator of a fundamental interaction, which is expected to acquire nonclassical features, and…
Reply to "Masanes-Galley-Müller and the State-Update Postulate"
Thomas D. Galley, Lluís Masanes, Markus P. Müller
In a recent comment on the arXiv, Blake C. Stacey criticizes our derivation of the quantum state update rule in Nat. Commun. 10, 1361 (2019). Here we argue that the criticism is un…
Perspective-neutral approach to quantum frame covariance for general symmetry groups
Anne-Catherine de la Hamette, Thomas D. Galley, Philipp A. Hoehn +2
In the absence of external relata, internal quantum reference frames (QRFs) appear widely in the literature on quantum gravity, gauge theories and quantum foundations. Here, we ext…
Quantum Relativity of Subsystems
Shadi Ali Ahmad, Thomas D. Galley, Philipp A. Hoehn +2
One of the most basic notions in physics is the partitioning of a system into subsystems, and the study of correlations among its parts. In this work, we explore these notions in t…
Post-quantum steering is a stronger-than-quantum resource for information processing
Paulo J. Cavalcanti, John H. Selby, Jamie Sikora +2
We present the first instance where post-quantum steering is a stronger-than-quantum resource for information processing -- remote state preparation. In addition, we show that the…
A no-go theorem on the nature of the gravitational field beyond quantum theory
Thomas D. Galley, Flaminia Giacomini, John H. Selby
Recently, table-top experiments involving massive quantum systems have been proposed to test the interface of quantum theory and gravity. In particular, the crucial point of the de…
Quantum reference frames for general symmetry groups
Anne-Catherine de la Hamette, Thomas D. Galley
A fully relational quantum theory necessarily requires an account of changes of quantum reference frames, where quantum reference frames are quantum systems relative to which other…
How dynamics constrains probabilities in general probabilistic theories
Thomas D. Galley, Lluis Masanes
We introduce a general framework for analysing general probabilistic theories, which emphasises the distinction between the dynamical and probabilistic structures of a system. The…
The measurement postulates of quantum mechanics are operationally redundant
Lluís Masanes, Thomas D. Galley, Markus P. Müller
Understanding the core content of quantum mechanics requires us to disentangle the hidden logical relationships between the postulates of this theory. Here we show that the mathema…
Any modification of the Born rule leads to a violation of the purification and local tomography principles
Thomas D. Galley, Lluis Masanes
Using the existing classification of all alternatives to the measurement postulates of quantum theory we study the properties of bi-partite systems in these alternative theories. W…
Classification of all alternatives to the Born rule in terms of informational properties
Thomas D. Galley, Lluis Masanes
The standard postulates of quantum theory can be divided into two groups: the first one characterizes the structure and dynamics of pure states, while the second one specifies the…